优化白色主题渲染逻辑

public/js/app.js

@@ -128,12 +128,24 @@
     // Start data fetching
     fetchMetrics();
     fetchNetworkHistory();
+    
+    // Site settings
+    if (window.SITE_SETTINGS) {
+      applySiteSettings(window.SITE_SETTINGS);
+      // Actual theme class already applied in head, just update icons and inputs
+      const savedTheme = localStorage.getItem('theme');
+      const currentTheme = savedTheme || window.SITE_SETTINGS.default_theme || 'dark';
+      updateThemeIcons(currentTheme);
+      
+      // Still populate inputs
+      dom.pageNameInput.value = window.SITE_SETTINGS.page_name || '';
+      dom.siteTitleInput.value = window.SITE_SETTINGS.title || '';
+      dom.logoUrlInput.value = window.SITE_SETTINGS.logo_url || '';
+      dom.defaultThemeInput.value = window.SITE_SETTINGS.default_theme || 'dark';
+    }
+    
     loadSiteSettings();
 
-    // Initial icon check based on early head script
-    const currentTheme = document.documentElement.classList.contains('light-theme') ? 'light' : 'dark';
-    updateThemeIcons(currentTheme);
-
     setInterval(fetchMetrics, REFRESH_INTERVAL);
     setInterval(fetchNetworkHistory, NETWORK_HISTORY_INTERVAL);
   }
@@ -444,6 +456,8 @@
       const response = await fetch('/api/settings');
       const settings = await response.json();
       
+      window.SITE_SETTINGS = settings; // Cache it globally
+
       // Update inputs
       dom.pageNameInput.value = settings.page_name || '';
       dom.siteTitleInput.value = settings.title || '';